Thanks for replying Shawn -
- nope, Illustrator doesn't show up on the list and I get no action when selecting the .exe.
By default, the program/exe selection box opens to 'C:\Program Files', but it's actually installed in 'c:\program files (x86)'. (BTW, sorry it's CS4 actually, not CS3. Tried relocating the exe to 'program files' but of course that didn't work).
Also, CS4 apparently doesn't allow a repair, just un/re-install.
[Hello Greg, and welcome to Seven Forums.
You might see if reinstalling CS3 to do a repair install may help.
Are you able to select to "Open with" CS3 or it's .exe file for .ai files? Open With - Change Default Program
Hope this helps for now,